Friction shock-absorbing mechanism



La? s. B. HASELTINE FRCTION `SHOCK BSORBINGA MECHANISM- Filed April so, 1923 2 sheets-sheet 1 March v9 1926.

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Patented ll/lar., 9, 1926.

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STACY B. HASELTINE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE .lSSXG-NMEMS, Tf.

' 'W. H. MINER, ING, A CORPORATION Ol? DELAWARE.

FRICTON SHOCK-ABSORBNG MECHANISM,

Application filed April 30, 1923. Serial. No. 635,51?.

To all whom it may concern:

Be it known that l, STACY B. Hasen- 'riivin a citizen of the United States, residing at Chicago, in the county ofv Cook and State of Illinois, have invented a certain new and useful Improvement in Friction Shock-Absorbing Mechanisms, of which the following is a full, clear, concise, and exact description, 'reference being had to the accornpanyinp;` drawings, forming a part, of this specification. i

lhis invention relates to improvements .in friction shock-absorbing n'iechanisins.

Une object of the invention is to provide a shock absorbingA mechanism of the spring friction type, wherein are employed a plurality of alternated, intercalated, relatively stationary and movable friction elements in combination with pressurecreating` means coolwrable therewith and so arranged as to augment the friction..between the said elements by opposed directed pressure on said elements, duringthe ionipression l Another and more `speciti'c object of' the invention is to provide a mechanism of the character indicated, employinp` a plurality of intcrcalated, relatively movable friction plates, comprising;` two sets, wherein one is carried by the front follower formovement relatively lo the other set, dliringl the compression of the mechanism, and is returned tonormal position directly by said follower, whereby direct engagement of the spring follower with .the plates is entirely eliminated.

(.)ther object-s and advantages of the in'- vention will more clearly appear from the description and claims hereinafter followinn'.

ln the d 'awings, forming,` a part oft-his specification, Fig. l is a horizontal, lengt ludinal, sectional view of a portion of a railway draft rigging showing my improvements in connection therewith. Figs. 2 and are vertical, transverse, sectional views corresponding substantially to the lines 2--2 and respectively, of Figi'. l. Fig. il is a vertical, longitudinal sectional view corrcsponding;v substantially to the line flof lfi'g. Figs, and t5 are detail, perfriction plates lassociated with the front follower' and one of the friction plates lined to Athe rear follower member. l

In said drawings 10%10 denote channel draft sills of a railway car under-frame, to the inner faces of which are secured 'front stop lugs ll and rear stop lugs i2. The inner-.end of a drawbar is indicated at 13,

`the saine having operatively associated therewith a hooded cast yoke lll- The shock absorbing mechanism proper is mounted within the yoke 14C and the parte are sup ported in operative position hy means of a detachable saddle plate'l.

The shock absorbingmechanism proper, shown, comprises, broadly, a front follower casting il; a column load sustaining member B which also functions as the rear follower of the mechanism; twin arranged springs (n-C; a springtl follower l); a group of intercalatedv friction' plates E; a pair of wedge blocks l; a pair of wedge shoes (l, a pair of anti-fricti0n rollers H interposed between the wedge blocks and the wedge shoes; and a retainer holt l.

v p i lhe front follow er casting A. is in the form of a boxlike member open at the rear side, having spaced top and bottoni. walls 1G and 17, side walls ISMlS, and a front wall lf). lhe central. portion of the upper wall 1G is upwardly offset with refer ice to the main portion of the wall, thereby providing` a longitudinally extending, rela tively wide recess 20. The bottom wall li' is similarly offset in a downward direction, thereby providingx a. corresponding 'recess y2l. 'lhe recesses :2U and 2l terminate a short distance from the rear end of the top and bottoni'walls G and l?, thereby providing downwardly and upwardly projo ing' ribs Q2 on the walls 16 andi?, resgectively. At their rear ends, the side walls 13 are provided, with vertically extending, inwardly projecting ianges 9A adapted to strengthen the follower against bursting stresses, and

-to afford additional hearing; against rear vfollower' member B at end of compression stroke. y The column-learl-sustaining; member l, which functions as the rear follower, is in the form of a casing, having top and bolitoni walls 25, and 26, and a rear end wall (lll sr wall :2? adapted to coact direct- 1 the rear stop lugs l2, in a well manner. The casing B is open at the opposite sides and at ine front end thereof, the side openings being provided to permit the insertion ofthe springs and :follower D. ,.Pit the front end of the easing B, the top and bottom walls are connected. vhy short, lly enter `ing webs or side walls 28, t ends. the side walls 28 are with inwardly extending flanges sing il is also provided with a walls 25 and :26 and formed integral wall 2'?. Irlie central partition `rewided with concave faces at the o psic'es 'thereof and adapted to co-aet the spring resistance elements C ,to saine in spaced relation and in sition. The front end of 'the parezr eed reinfwardly of the front 7s eff B the proper distance to full Increment of the spring follow- J lil' durins the compression oi the mechan- ,e without, actually engaging the same. et its lo ard end, the casing l5 is also provided wi i e. tiensverscly arranged, vertically extending, centrel wall. 3l., spaced inidly :trein the outer Yend of the casuigg as sly shown Fig. 4, and. formed integral casing l5, the top and botl Q6 are transversely slotted outer or 'f' torn walls/lle and as iiocated at 32, thereby providing; transy extending ribs 33, for a purpose nereinater described.

The wedge blocks l? like construction and within the iront follo' efr at opposite sides thereof. Esch of the hloelrs l? is provided with a flat face tient end thereof adapted to abut a .e interposed between the inner the front wall. 19 oit the follower A end the wedge blocks; a. tiet side :tace 36 to abut the inner face of the adjzh 'wall 1S; a fiat rear lace 37 and an e^'.ge face 38. A. roller-receiving reformed in each bloeit l? adapted to receive one of the rollers H.

Wedge shoes G are oi like construction end eme arranged on opposite sides of the cent. i l group of friction plates' lll. the wedge shoes (lr is formed on its enter side with a wedge aee 4.-@ oppes and parallel with the wedge :lisce 3, oi me eorrespending nf'edg'c `nloclr F. #l l1 e l `cess 4l is formed in s G, said recesses beme; opposedto the roller-rcceiving recesses i of 'the w l fe blocks if and thereby serving to n'ieintain the rollers H in proper rewith 'respect to the wedge bloc-lis and '.ltie wedge slioes are formed Lever/5? with inner flat faces 42 adapted ,to co-act with the outermost friction plates of the group of plates, and beveled rear faces 43 adapted to co-act with the spring follower D transversely extendingpbeveled faces 45 at their front ends which are adapted to seat onthe correspondingly beveled faces 43 at the rear ends of the wedge shoes G. As clearly shown in Fig. l, the beveled faces and 45 are inclined inwardly and rearwardly of the geaigthereby tending to force 'the rear ends of the wedge shoes inwardly toward the axis of the gear and hold the same in flat Contact with the outermost plates oi: the centrally disposed group of friction plates.

The group of friction plates E consists of, a centrally disposed, relatively heavy, plate 46 and two sets yof interoalated plate arranged at opposite sides of the plate 46, each set comprising three plates 47 and two plates 48. The' plates 47 as clearly shown in Fig. 5, are notched at the upper and lower sides, near the rear ends thereof, thereby providing shoulders 49. The plates 47 are carried by the front follower A with. the upper and lower edges thereof received, within the respective recesses 2O in the upper and lower walls et' said follower. fis will he evident, upon reference to Figs., 4 and 5, the shoulders 49 of the plates 47 are so located that a limited amount ot' movement of the plates isfpermittcd with reference to the'ollower A, whereby the front ends of the plates 4'? are normally slightly spaced from the inner face of the wear plate which abnts the front Awall 19 of the follower. The shoulders 49 of the plates 4'( are adapted to be engaged by the ribs 22 on the top and hott-om walls of the front follower, thereby holding the plas 47 assembled relation with the follower and effleeting: outward movement of the plates with the follower' to restore the same to normal position. The plates 48 are alternated with the )lates 47, as clearly shown in Fig. l, two of the plates 47 being; arranged outermost and engaging with the dat inner 'faces #1l-2 of the wedge shoes G. .I As most clearly shown in Figs. 4 and' G, cach of the friction plates 48 is provided with a pair of lugs 50 located at the rear'end' thereof, one of said lugs projecting' upwardly from the upper edge and the other projecting4 downwardly from the. lower edge. The lugs 50 arc ada ted to engage within the slots 8:2 formed in sie upper and lower .walls 25 and 526, respctively, of the casing B, and are adapted lli No Pg.

for.

to abut the rear faces of the ribs 33 thereby retainingl the plates 48 in fixed relation with relerence to the casing B. A wear plate 51 is interposed between vthe rear ends of the platee le and the outer face of the transverse wall 3l oi' the casing' l5.

ll central plaie i6 oi the group of Yfriction plaies is of substantially the same eonstruction the plates 4S and is provided with ngiwardly and downwardly projecting luge similar to the lugs 50, adapted to engage within the recesses S2 and hold the plate lfin tired position against longitudinal movement with reference to the casinp` B.

rllhe plates 47' are assembled with the liront follower by inserting the same while in a, diagonally disposed position and bringing the shoulders nl into engagement with the inner 'faces of the ribs 22, plates so that they are vertically disposed into proper spaced position to receire the plates i6 and 4S therebetween. rlhe plates f-l-ti and i8 are assembled with the follower easing l by inserting' the rear ends ot' the same in the ii'ront end et the rear follower casing while diagonally disposed with reference to the rei-tical, and bringing; the luge 50 Ain alinement with the slots 32, wal-iereupon the platee arel turned until ihev lie in Vertr cal planes with the lugs 5t) within the slots 32. The plates #lo and 48 may then be moved laterally into proper position to engage alternately between the plates 417.

'lhe retainer holt I is adapted to hold the parts ot the mecl'ianism in assembled relationy having one end 'ameln'n'ed within the rear follower casing by means ot' the head thereof engaging behind the wall 3l, and having the other end thereof anchored" to the 'front wall 19 ot the follower casing A. the shank' of Said bolt extendini;` through alined recesses inthe walls 3l and 19 and through a longitudinal bore 52 in the tric- 'tion plate Alli, an opening being.; provided in the transverse wall of the spring follower l) to accommodate the head of the bolt.

lho operation of the device as 'lillows7 :resuming an inward or bullingi` movement otn the drawhar. As the front follower ,fr is forced inwardly or rearwardly under 'the action of the drawbar7 the lirst eilect is to produce a laterally7 inwardly Vdirected pressure from the wedge blocks l? to the wedge .shoesK l, the resulting slight relative ,loinritiulinal movement llherelmtween being;

'micomplishcd without appreciable friction 'on account of the rollers ll'. The wedge 'shoes (l are picked up and vtoi-eed rearwardly without any appreciable movement o'l-the plates composing the group ll. The .'idfal'ice of the wedge shoes il iorces the prima' follower l) rearwardly, thereby compressing the twin s] ring resistance (IMC. The action described continues with a `v `raduallv increasing wedging -action,

by turningl the due to the spring resistance, until the plate 35 of the front follower A engages with the outer ends of the plates 47. It will loe evident that, at the instant the front follower A engages with the plates 47 so as to more the latter7 the desired degree ot' pressure from both sides will have been 4imposed upon the centrally disposed group of the 4laces 43 and 45 of the spring olv lower l) and the wedge shoes (l, respectively,- therc will be a tendency to torce the rear ends oi` the wedge shoes (l inwardly, thereby holding the inner fiat 'laces 42 ot' the wedge shoes in proper contact with the outermost plates lr-7. i

lt will he evidentthat, during` the movement. oi' the front il'ollower A. toward the colunii'i-load-sustaining member Il and the inward movement ot 'the plates -ilT therewith` the plates 48 and plate 4G Will hec? held in fixed position 'relative te the .niember l by their rear ends abutting the plate 5l interposed between the. same and the wall -l, the wall 8l providingl a substantial and solid abutment for the samel rl`he front end of the member B and the roar end ot the front follower A are so spaced that.` when the `gear fully compressed and bolore the springs have become solid, the front follower:casting` A and tho member li will abut, thereby transmitting the pressure directly through the front follower and member l to the .stop lugs ol the dra'lt sills.

Upon removal or dis\ 'ontini|a1iee ol.4 the actuating pressure, the springe immediately re-act through the spring follower l) and, inasmuch as the Wedge blocks F and the wedge shoes (l are anti-lrictnmallv f mounted with respect,VV to each other, the collapse of the wedge-pressure system is inatantaneous', thereby linlinediafnily 'relieving the lateral pressure on the friction elements. lhe re-action of the springs C through the spring follower l) causes the Wedge shoes G, the wedge blocks F, and the from .follower A to move outwardlyindependently of any movement of' the friction' plates, lower A engage Wit-h the Shoulders on the friction plaies 17, whereupon the plates are pulled out directly by the front, iol lower A and all of the parts restored to normal position. During, the outufard until the ribs 22 of thefro'nt folmovement of the plates 47, with the front follower A, movement of the platee l5 and 48 therewith will be prevented by engagement of the lugs 50 with the ribs Ii.

it will be evident that the action o mechanism in. a draft movement will be similar to that just deseribed, the oni)T difference being that springs are eempressed against the praetieally stationary spring' follower, and those parte` which were stationary nnder the bniingr stroke being' movable, whiie the parts whieh were movable are stationary.

i have berein shown and Vdesrrimd what l now consider the prel'erred manner oi? rarr \vfin;f ont the invention, but be same is merely illustrative and contemplate all changes and niodiiieatione ibit vcome within the scope of the elaims appended hereto.

i claim:

l. in a 'irietion shock absorbing mei-banism` the combination with a eolnnm-ioad sustaining member; of a main follower movable relatively toward and from `@aid member; a plurality oi" vl'rietion elements mounted on said member; means for holding said elements against movement lonitudin nailyol' said member` said meansI including e fixed abutment wail on .said member engaging' the rear ends of said elements; a plurality of i'rielion elements intereaialed with respect to said lirst named i'rietion ele niente` said last named eien'ients being eonneeted to the front follower and movable therewith; a noir ot Wedges Carried by Said front follower; e snrin'g resistance; a spring7 follower eo-aeting with said spring resistance, said Spring :follower being; arranged in spaced relation to all of said elements; and a pair of wedge 'shoes interposed between said spring' follower and said wedges7 Said wedge shoes bearingon the outermost or said elements.

f2. -In a friction shock absorbing meehanism, the eombinriiion with a column-loadsustaining;f member; oi a main i'oliower movable relativey toward and from said member; a 'plurality of friction plates mounted on said member and held against movement iongitnclinelly thereof; a plnralitjytof frietion plates inerealated with. respect to said first named friction plates, said last named plates being connected to the front 'follower and movabie therewith both toward and from said member; a pair ot Wedges carried by said main 'foilowem e spring resistance; a spring follower eo-aeting with said spring resistanoe; said spring follower boing ar-v ranged in spaced relation to all oi seid plates; and e. pair of wedge shoes interposed between said spring follower and said wedges, and bearing on. the outermost of said plates, said shoes having beveled iaees at the. inner endsthereotadapted to moet Larme? with eorresponfiinely be-Veiei. feces oie. spring follower. e

3. in frietion shock absorbing nieehem mein` the combination with a. eoiuinnioad- Sustaining; member having en abrite nt wall at the iront thereof; o e mein. follower movable relatively toward and from .sani member; a plurality of frietion piane@ eerq rieii byy said vfollower and movabie iberowith toward. and from :said nien'iber; :i plurality of lrietion eiernents intereaieiied ivi'n respeet to said plates and held against movement iongitndinellyA oi said member willi the rear ends thereo abutting ai walls; u spring resistance; a spring lower; and lateral wedge 'iresrnire means on opposite sides or seid plates and elements said means being.,r interposed be tween said spring;h foi-low r and mein 'fob lower.

i. in a frietion shook absoi-bingmeoiienisniv the combination with a eoinmri-ioetb :is-taining member; of an out/er follower movable relatively toward end from seid member; a group of interrelated, reiatir'eiy longitudinally movable friction pirates, eeriain oil seid platee being anchored to seid membeand the remaining pieter, bei movable 'with'egiid outer oilower; an. aientn ment waii i'ireivith respect to said mi and extending-*across the inner ends et eeii interealated plates, said Wali engaging the inner end ot the platesanehored 'io Said member; ineens engagedij and actuated by' said. oniier follower for placing said pieves under lateral. pressure; 'and e yielding renisianie ien-operable with. seid. pressure ere-amig means. i

in a' 'friction shock absorbing;'mechai nism, the eombination with a coininn-ioni?. Sustaining member open at one end i previdedv "with an inegrel'abntmen elaii 'disposed centi-elly an i 'nwordiy oif t ie oi onine in the end thereol of o, Centrali? i i 7" ered; relatively iongitndi naiiy morebl *ietion' piet-eef, eer-tui said plates beingy anchored to member and edaptedto transfer the 10mi. tirer-airone, to said abnmentivail; an outer fe movable towardend from :esaid nie e ieterei wecigelilreeeii-re creating infernoy opposite Sides efe-seitig'roup o iieeeg spring resistenoe Within said member; and means interposed between said spring" re sistenee and each. oif the ieteroi premiereereating ineens for transmitting 'the Spring resistance to seid pressmeereating means,

- G., inra friction shock absorbing meehenism, the combination with e eoimnn-iomi sustaining member having abutment means at the front enti thereof; ot a main ioiiower om Sani movable reiativehv ioirerd member; piarai toward end, from @2 friction paises iqnefscstez with mapeo@ *m said first named pmt-es and heid aggams; movement longitudinally 0:5 said mem'y-elf with the rear endstnemof abuting said. abutment means; a spring 'essmnce; w spring followe; and a WsdgQ sysem im* creating haeral pressure on Said plates, said Syslem ming interposed bwcon Suid Spring 'olower and main UOWQL'.

u Witness mt Claim the forego hav@ hm'euno subscribed my nume thi. day of fp 192.3.

STA() Y B. HSELTINE. 

